You can have each USRP on the same computer or not, that shouldn't matter. I've done this test with some USRP2's and I remember what we did was transmit a CW tone from one to another and measure a frequency offset (maybe 10s of kHz?). Basically, transmit a tone at some known frequency (like 200 MHz) and measure the received frequency (maybe something like 200.02 MHz) and then add the 0.02 into you center frequency for this test.
You can also just synchronize the USRPs with a 10MHz reference and 1PPS. Devin On Tue, Aug 25, 2015 at 5:14 PM, John Garrick <li...@ruby-forum.com> wrote: > Hello, > > I want to transmit the data between two USRP's and make them communicate > with each other. But I guess the packets are not being received > properly. > I am connected the two USRP's to the same laptop and trying it. Is that > applicable? I mean, will it work if I do that? Or should I connect to > two computers and perform that? I have been receiving this error. > > linux; GNU C++ version 4.8.4; Boost_105500; > UHD_003.009.git-144-g407e3086 > > Using Volk machine: avx_64_mmx > -- Opening a USRP1 device... > -- Using FPGA clock rate of 64.000000MHz... > > No gain specified. > Setting gain to 56.250000 (from [0.000000, 112.500000]) > > UHD Warning: > The hardware does not support the requested RX sample rate: > Target sample rate: 0.050000 MSps > Actual sample rate: 0.250000 MSps > > Symbol Rate: 25000.000000 > Requested sps: 2.000000 > Given sample rate: 250000.000000 > Actual sps for rate: 10.000000 > > Requested sample rate: 50000.000000 > Actual sample rate: 250000.000000 > ok = False pktno = 53034 n_rcvd = 1 n_right = 0 > ok = False pktno = 24 n_rcvd = 2 n_right = 0 > ok = False pktno = 35 n_rcvd = 3 n_right = 0 > ok = False pktno = 44 n_rcvd = 4 n_right = 0 > ok = False pktno = 46 n_rcvd = 5 n_right = 0 > ok = False pktno = 46 n_rcvd = 6 n_right = 0 > ok = False pktno = 3872 n_rcvd = 7 n_right = 0 > ok = False pktno = 12304 n_rcvd = 8 n_right = 0 > ok = False pktno = 49 n_rcvd = 9 n_right = 0 > ok = False pktno = 50 n_rcvd = 10 n_right = 0 > ok = False pktno = 54 n_rcvd = 11 n_right = 0 > ok = False pktno = 200 n_rcvd = 12 n_right = 0 > ok = False pktno = 63 n_rcvd = 13 n_right = 0 > > Please suggest. Thank you > > Regards, > Ravi > > -- > Posted via http://www.ruby-forum.com/. > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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